Scutellonema Clathricaudatum N. Sp. (Hoplolaiminae: Tylenchida), a Suspected Ectoparasite of the...
Whitehead, A.G.
1959-01-01 00:00:00
SCUTELLONEMA CLATHRICAUDATUM N. SP. (HOPLOLAIMINAE: TYLENCHIDA), A SUSPECTED ECTOPARASITE OF THE ROOTS OF THE COTTON PLANT (GOSSYPI UM HIRSUTUM L. VAR. UK 51) BY A. G. WHITEHEAD East African Agriculture and Forestry Research Organisation, Kikuyu, Kenya, Africa Two samples of soil from around the roots of cotton, Gossypium hirsuturn L. var. UK 5 1, collected from a site in Tanganyika which had been planted to cotton for fifteen consecutive years, contained 5000 and 1000 specimens respectively, per litre of soil, of a new species of Scutellone-izia AndrAssy 1958. This species is believed to be an ecto- parasite of cotton roots but its pathogenicity is unknown. S cutellonema clathricaudatum n. sp. Body stout, fixed specimens take the form of the letter C. Head shaped like truncated cone, with typically seven annules, occa- sionally six. Skeletal framework of head strongly developed (Fig. iC), the extremities of basal plate extending back into body half width of first body annule. Body cuticle coarsely annulated, annules on middle region about 2 pt wide. Lateral fields arise a few annules behind the head. Each field has four somewhat crenate incisures for greater part of its length. There are traces of striation on the two
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Abstract

SCUTELLONEMA CLATHRICAUDATUM N. SP. (HOPLOLAIMINAE: TYLENCHIDA), A SUSPECTED ECTOPARASITE OF THE ROOTS OF THE COTTON PLANT (GOSSYPI UM HIRSUTUM L. VAR. UK 51) BY A. G. WHITEHEAD East African Agriculture and Forestry Research Organisation, Kikuyu, Kenya, Africa Two samples of soil from around the roots of cotton, Gossypium hirsuturn L. var. UK 5 1, collected from a site in Tanganyika which had been planted to cotton for fifteen consecutive years, contained 5000 and 1000 specimens respectively, per litre of soil, of a new species of Scutellone-izia AndrAssy 1958. This species is believed to be an ecto- parasite of cotton roots but its pathogenicity is unknown. S cutellonema clathricaudatum n. sp. Body stout, fixed specimens take the form of the letter C. Head shaped like truncated cone, with typically seven annules, occa- sionally six. Skeletal framework of head strongly developed (Fig. iC), the extremities of basal plate extending back into body half width of first body annule. Body cuticle coarsely annulated, annules on middle region about 2 pt wide. Lateral fields arise a few annules behind the head. Each field has four somewhat crenate incisures for greater part of its length. There are traces of striation on the two